Retort-lid



(No Model.) 2 Sheets-Sheet 1.

' P. C. PRINDLE.

' RETORT LID.

Patented Dec; 10, 1889.

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(No Model.) 2 sheets-sheet 2 VP. 0. PRINDLE;

RETORT LID. M No. 416,855. Patented Dec. 10; 18 89 mvemtoz E GWPrz/hdle,

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UNITE STATE/S FRANKLIN o.- PRI DLE, or WILMINGTON, NORTH CAROLINA. j

RETofRT-Lm.

SPECIFICATION forming part of Letters llfatent No. 416,855, dated December 10, 1889.

Application filed March 27, 1889;

ver and State of North Carolina, have in-i ventedcertain new and useful Improvements in Retort-Lids, of which the following is a specification, reference being had to the accompanying drawings. I

My improvements relate to cylindrical re-; torts which are provided with doors for, ad-I mitting raw material and for removing the residual products after heat has been appliedf to the retortsas, for example, for the de-I structive distillation of wood. In fact, my,

improvements may be applied to hollow cyl-I;

' masonry, sov as to leave an air-space between the retort and the masonry to facilitate coolders of any sort.

The obj ect of my invention is to produce improved means of closing the end of a retort or hollow cylinder,so as to secure gas-tight joints, and to prevent undue waste of heat by conduction or radiation.

reference to economy of manufacture, durability, and convenience in use.

In the accompanying drawings,illustrating my improvements, Figure 1 is an end elevation of aretort provided with a circular hinged door and annular parts around its margin corresponding in function and relation to a common door-jamb. Fig. 2 is a section on the line 2 2 of Fig. 1. Fig. 3 is a section on the line 33 of Fig. 1. Fig. 4 shows an annular end casting to which in practice the door is hinged. Fig. 5 shows an annular casting which constitutes the frame of my improved door. Fig. 6 shows a sheet-metal ring to be secured in practice around the periphery of the annular end casting shown in Fig. 4.

Referring to the letters upon the drawings, A indicates a section of a hollow sheet-metal cylinder suitable for a retort; B, an annular end casting having a cylindrical part B,

The structure of my improved appliance is also designed with Serial No. 804,952. (No model.)

also formed with an opening or passage- (indicated at G and in practice located in the lower part of the casting) for thepurpose of adapted to support the end of a retort-. It is PATENT OFFICE.

drawing off anyresidual liquid products that may be contained in the retort. This passage may have applied to it any suitable cock for this purpose; but as any ordinary Icockjor faucet adapted to such uses will answer, and asit forms no part of my invention, his not illustrated in the drawings;

-H indicates a sheet-metal ring, which is bolted, as at I, or otherwise suitablysecured to the outward projection D. of the end casting B, and serves to rest the retort upon the ing and to prevent overheatingthe retort in use and injuring it. t

K in dicates suitable hi n,gepivot projections of ordinary character properly placed or formed upon theouter face of the end castin przferably cut away, so as to incline, as illustrated. A shoulder M is formed upon the inner part of the end casting B, inclining in an The end of the retort-cylinderat L is opposite direction to the incline of the end of the retort just mentioned. The object of this structure is to form a dovetail annular pocket 1 for receiving packing N, which extends in practice all around the end of the retort and I secures a gas-tight joint between it and the end casting. p

0 indicates an annular casting suitable to form a frame for the retort-door and adapted to fit within the end casting B. The door is composed of this end casting-and an outer sheet-metal plate P and an inner sheet-metal bolts U pass to preserve the contour of the p door-plates, which gives great strength to the door. Any suitable packing may of course be used, if desired, between the margins of the plates and the annular casting O to make gas-tight joints; but no such packing is illustrated, because it forms no part of my invention and is generally not necessary where the metal work is properly done.

V indicates a handle for the door.

W indicates an outward annular projection from the casting 0, having an annular flange W, adapted to fit into the annular socket E of the casting B and bear upon the packing-ring F to make a gas-tight joint.

X indicates a series of projections from the end casting B, provided with wedge-holes to receive the wedges Y. These wedges bear at one end upon stumps Z on the end casting B and at the'other upon stumps Z upon the annular casting O and serve to hold the door in place when closed, as is usual.

a indicates the door-hinges, of usual construction.

By the instrumentalities described I am able to form end supports and closers for retorts provided with hinged doors which are cheap, durable, gas-tight, and convenient to use, and that will conserve the heat of retort ends, so as to render the interior of a long retort more uniform in temperature than is usually practicable. By this means I dispense with the inconvenience of clay lutings ordinarily used in this class of retorts (which lutings are liable to shrink and crack) and enable them to be opened and tightly closed with facility by an ordinary workman without danger of either the liquid or gaseous products Within the retort escaping.

What I claim is 1. As an improved article of manufacture, an annular end casting for a retort-cylinder, provided with a cylindrical part B for securing it to a retort, an inner annular projection D, having an annular socket E therein for receiving an annular packing, and an outer annular projection D for supporting a retort end on masonry, substantially as set forth.

2. The annular end casting B, provided with the part B, the annular projections D and D, and the annular packing-socket E, in combination with the packing-ring F, adapted to fit in the said socket, and the annular casting 0, provided with the annular projection W, having the annular flange W, substantially as set forth.

3. As an improved article of manufacture, an annular casting for a frame of a retort: door, having an outward annular projection W and annular flange W for fitting an annular packing-socket, substantially as set forth.

4. A door for retorts or hollow cylinders, consisting of an annular casting or frame part 0, two concavo-convex metal plates secured on opposite sides thereof with their convex faces outward, and a heat-non-conducting filling and suitable stay-pieces between the plates, substantially as set forth.

In testimony of all which I have hereunto 7o subscribed my name.

FRANKLIN C. PRINDLE.

Witnesses:

R. H. MOKAY, R. H. BUNTING. 

